Since commit 1cf4f629d9d2 ("cpu/hotplug: Move online calls to
hotplugged cpu") it is ensured that callbacks of CPU_ONLINE and
CPU_DOWN_PREPARE are processed on the hotplugged CPU. Due to this SMP
function calls are no longer required.
Replace smp_call_function_single() with a direct call of
hw_breakpoint_reset(). To keep the calling convention, interrupts are
explicitly disabled around the call.
Cc: Catalin Marinas <catalin.mari...@arm.com>
Cc: Will Deacon <will.dea...@arm.com>
Cc: linux-arm-ker...@lists.infradead.org
Signed-off-by: Anna-Maria Gleixner <anna-ma...@linutronix.de>
---
arch/arm64/kernel/hw_breakpoint.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)
--- a/arch/arm64/kernel/hw_breakpoint.c
+++ b/arch/arm64/kernel/hw_breakpoint.c
@@ -886,9 +886,11 @@ static int hw_breakpoint_reset_notify(st
unsigned long action,
void *hcpu)
{
- int cpu = (long)hcpu;
- if ((action & ~CPU_TASKS_FROZEN) == CPU_ONLINE)
- smp_call_function_single(cpu, hw_breakpoint_reset, NULL, 1);
+ if ((action & ~CPU_TASKS_FROZEN) == CPU_ONLINE) {
+ local_irq_disable();
+ hw_breakpoint_reset(NULL);
+ local_irq_enable();
+ }
return NOTIFY_OK;
}
